Pi Day

The ratio between the radius of a circle and its perimeter is 3.14159, The same mathematical constant appears in other formulas and relationships.  The important number is often represented by the Greek "p", the Greek letter called "pi". Today is March 14 so it can be represented as 3/14.  Therefore, today is "Pi" day! 

https://search.yahoo.com/yhs/search?hspart=iba&hsimp=yhs-3&type=teff_10019_FFW_ZZ&grd=1&p=Pi

The symbol on the pizzas shown on this page is the Greek letter.

Here is a link to further information about the number.

https://duckduckgo.com/?q=what+important+formulas+include+the+constant+%22pi%22&atb=v423-1&ia=web

Have some "Pi"!